Channeling device fob sewing-machines



J. F. DAPRIX.

CHANNELING DEVICE FOR SEWING MACHINES. APPLICATION FILED 05c. 17. 1914.

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ATTORNEYS UN rrni). s'rATEs PATENT orrion.

JOHN F. DAPRIX. OF U'I'ICAJNEW YORK.

Specification of Letters-Patent.

Patented Aug. 15, 1916.

Application filed December 17,- 1914. Serial No. 877,662.

and exact description thereof; which will en-' able others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the reference-numerals marked thereon, which form part of this specification.

My present invention relates to shoe-channellng devices such as are used upon sewing ,maehines for sewing shoes and other forms of leather goods or similar material.

The purpose of my invention is to provide an improved device of the character describedand'onc which is simple and economical of construction, easily applied to or removed from sewing machines and efficient and durable in operation.

A further purpose of my invention is to provide a channeling device of the character described having improved means for cutting a channel of varying depth at different times and having improved means for readily adjusting the depth of such channel without changing the channeling knife or the position of the knife or without removing the device from the work-plate of the sewing machine. a

A still further purpose of myinvention is to provide a channeling device wherein the depth of thechannel is regulated not by changing the position of the channeling knife but by raising or lowering the top plate of the device so as to leave a greater or less extent of channeling knife above the top .plate and so effective for work. Improved means are also provided for supporting this top plate in varying positions effectively against the considerable pressure and strain brought thereupon during the sewing operation.

Figure 1 is a top or plan view of a channeling device embodying my invention. Fig. 2 is a top or plan view thereof with the top plate removed. Fig. 3 is a side elevation of the device shown in Fig. 1, with, the top plate slightly raised. 'Fig. 4. is a cross-section' on line 44 of Fig. 1.-but with the wedge member moved inward and the top plate accordingly raised. Fig. 5 is a plan view of the top plate. Fig. 6 is a bottom view of the device-shown in Fig. 1. Fig. 7

is a side elevation of the wedge shaped mcmbet; used to raise the top plate. Fig. 8 is a side view of a modified form of wedge shaped member. Fig. 9 1s a vertical cross- :sectional view on lines 99 of Fig. 1 or Fig. 4- but on a conslderably enlarged scale.

Referring to the drawings in a more particular description, there is shown a base 12 of proper size and adapted to rest in any desired position upon the work bed 13 of a sewing machine and provided with a needlereceiving aperture 14 adapted to receive therethrough the usual sewing machine needle 15 and awl 16 of the leather or shoe sewing machine upon which the device is to be used. To the base 12 is also secured the channeling knife 17 which is illustrated in the drawings as being let into the bottom of the base 12 and having its cutting end at right angles to its fastened portion and extended up through the needle aperture l-t. Preferably also the channelingdmife 17 will be removably and adjustably secured to'thc base 12'as by set screw 18 of which the head bears against .the upper surface of base 12' while its screw-threaded portion extends loosely'through an elongated slot 19 in the base portion and there is screw-threaded into the shank portion 17 of the knife. By loosening the set screw 18 the knife 17 may be adjusted longitudinally of the length of its shank in its containing groove 20 in the bottom of the base 12 so that the channeling knife 17 maybe properly positioned relative to the needle 15-and awl 16 of the sewing machine. Across the top of the base 12- a little inwardly from its sides are provided two grooves 21 in which are slidingly mounted wedges 22 having their ends away from the knife united by loop 22 so that the two acting wedges are really one wedge-shaped member with the loop 22. adapted to beilsed as a convenient-handle projecting outffiom .the end of the device away th'eltiiife.

particularly its outer end nearthe knife to 'move upward. It will obvious'that this.

- upward movement of the knife end of the top plate will operate in effect to sheath or house the relatively permanently fixed knife I 17 so' that less of the knife will extend above vided in the the top plate 23 and accordingly a shallower channel will be cut in the sole of the shoe being sewed by the machine.- It will be fur ther obviousthat by proper proportioning of the partsthe knife may be entirely housed 1 turn it down by the inner end of the base 12' in the form of clip 25. Furthermore I pro vide upstanding pins 26 toward the inner end of the base projecting snugly into holes 27 in the'top plate 23. A screw threaded pin QS-projecting upwardly from the base top plate.

12 through an aperture 29 in the 23 receives a-thumb nut 30 whereby the operator may securely hold the top plate in position down against the wedge shaped member after the adjustment has once been made. An 'elongated aperture 3]. is protop plate; 23 over set screw 18 to allow of the-adjustment of knife 17 withuntil out removing top plate 28. Holes 32 are [provided in the base 12 for securing the device to the work bed of a sewing machine by lineansof screws Downwardly project gng lugs;,33 maybe provided upon the base 2 fitting into sockets 34 upon the work bed "of the-'sewingmachine to assist in; readily placing and securely holding the device in proper positionl,

tin operation it:. will be seen that this-dedoes-not' have, tdbe'removed from the workbed of the machine in order to, adjust Mic-depth of the channel'from deep to shallow; orvice versa or. from some channel to no channel at all or vice versa, but that the operator. simply-loosens thumb nut 30 and pushes in or pulls out the wedge shaped member 22 by means of its loop portion 22 there is the properamount of knife or absenceof knife above-the top plate 23, then the thumb nut 30"i s serewed down against the top plate 'firmly holding it in desired position.

It will'thns be een that I have provided a channeling device very well adapted to be adjustedijto various depths of channel or absence of-Ichannel without removing any part.

neling knife 'the base and the top .plate andadapted to of the device and without removing the de- What I claim as new and desireto secure by Letters Patent 15:

In a channeling device for sewing machines, the combination of a base having a needle aperture and adapted to rest uponthe wor c bed of a sewing machine, a chanextending upward from said base, a top plate over the-base provided with a needle and knife aperture and a wedge shaped member interposed between support the latter at varying positions above the base by longitudinal adjustment of said wedge.-

In a channeling device for sewing ma-' chines, the combination-of a base having a needle aperture and adapted to rest uponthe work bed of a sewing machine, a channelingknife extending upward from said base, a top plate over the base provided with a needle. and knife aperture, a wedge shaped member interposed between the base and the. top plate and adapted to support the latter at varying positions above the baseby longitudinal adjustment of said wedge and adjustable means for holding said-top plate 9 l5 down upon the wedge.

In a channeling device for sewing mas chines, the combination of a base having a needle aperture and adapted to rest upon the work bed of a sewing machine, a channeling knife extending upward from said" base, a top plate over the base provided with. a needle and knife aperture and a two armedwedge-shaped'member interposed between the base and the top plate and adapted to support the latter at 'varying positions by longitudinal movement of said wedge; shaped member, said wedge-shaped member having its forming a' handle for adjustment of said member. v In witness whereof I have afli'xed my-signature, inthe presence oftwo witnesses. this 24th day of Nov. 1914. 1

JOHN F. DAPRIX;

Witnesses:

EVAB. F INoH," C. .D. PHmmrs.

resulting in great loss efhciency uponthe maouter ends connected bya loop. 

